JP2589083Y2 - Manual shaft support structure for automatic transmission - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to an automatic transmission,
The present invention relates to a support structure for a manual shaft that switches a select operation of a control valve in response to an operation of a control lever.

[0002]

2. Description of the Related Art Conventionally, as a manual shaft support structure of an automatic transmission, for example, one described in Japanese Patent Application Laid-Open No. 2-3778 is known.

In this prior art, one end of a manual shaft inserted into a transmission case is rotatably supported with respect to the transmission case, and a seal member for sealing the inside and outside of the transmission case is provided. The other end of the shaft disposed outside the transmission case is supported at a position outside the case by a part of the transmission case via a bush made of synthetic resin. Further, a groove is formed in the manual shaft, and a locate bolt is locked in this groove to perform positioning and retaining.

[0004]

However, in the above-mentioned prior art, there is a problem that there is no countermeasure to prevent the locate bolt from coming off.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides a simple and low-measure countermeasure for a locking shaft member for positioning and preventing a manual shaft such as a locating bolt. Cost, and
The aim is to achieve this by means without the possibility of oil leakage.

[0006]

In the present invention, the above-mentioned object is achieved by arranging and fixing the components in the automatic transmission at a position near the base end of the locking shaft member.

That is, in the manual shaft support structure of the automatic transmission according to the present invention, a manual shaft is provided in the transmission case to operate the control valve of the automatic transmission in conjunction with the operation of the control lever provided in the vehicle interior. A predetermined portion of the manual shaft disposed in the transmission case is inserted into a support hole provided in a boss formed in the transmission case, and a locking groove is formed in this portion. The boss portion is provided with a locking shaft member having a front end protruding from the supporting hole, and the front end of the locking shaft member is locked in the locking groove with a predetermined locking margin. On the other hand, the automatic transmission is mounted in a transmission case at a position not more than the locking margin in the axial direction from the base end of the locking shaft member. Component is configured to be fixed.

[0008] As a component of the automatic transmission,
A control valve body may be used.

[0009]

The manual shaft is locked at the distal end of a locking shaft member provided on the boss to prevent the manual shaft from falling off. There is an input in the pull-out direction for this locking shaft member,
When the locking shaft member attempts to move in the proximal direction, it is regulated by a component of the automatic transmission, such as a control valve body, which is fixed in a state of being close to or in contact with the proximal end.

The distance between the components of the automatic transmission and the base end of the locking shaft member is smaller than the locking allowance between the distal end of the locking shaft member and the locking groove of the manual shaft. The locked state is reliably maintained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

First, the configuration of the embodiment will be described.

FIG. 1 is a sectional view showing a main part of an automatic transmission to which a manual shaft support structure of an automatic transmission according to an embodiment of the present invention is applied, and FIG. 2 is a view taken in the direction of arrow A in FIG.

In FIG. 1, reference numeral 1 denotes a transmission case (hereinafter simply referred to as a case). The case 1 includes a gear train, a clutch and a brake for inputting a torque from an engine (not shown) to perform a shift. A gear housing 11 housing the friction element is formed.
A boss 11a is formed in the gear housing 11, and a support hole 11b is formed through the boss 11a.

The manual shaft 2 is inserted through the support hole 11b. This manual shaft 2
Is rotatably supported in the case 1, and one end outside the figure is
It is connected via a means such as a wire to a control lever (not shown) provided in the vehicle interior. The manual shaft 2 is connected to a manual valve (not shown) of a valve unit (not shown) housed in a control valve body 3 for controlling a switching operation of the automatic transmission. The manual shaft 2 is provided for operating the manual valve based on the operation of the control lever to perform the switching operation of the automatic transmission.

In the manual shaft 2, a portion arranged in the support hole 11 b includes:
The locking groove 2a is formed over the entire circumference. And
The boss 11a has a direction perpendicular to the support hole 11b.
Roketoboruto (engaging shaft member) 4 is provided, the locking projections 4a formed at the tip of the Roketoboruto 4, with respect to the locking groove 2a, engagement shown in the figure L ₁ The manual shaft 2 is locked at a stop allowance, and the manual shaft 2 is positioned and prevented from coming off.

The head 4b at the base end of the locate bolt 4
, The control valve body is fixed. The head and control valve body 3
Distance L ₂ and has a smaller dimension than the locking margin L _1.

Therefore, in the present embodiment, the manual shaft 2 is inserted through the supporting hole 11b and is rotatably mounted in the case 1. Then, the locating bolt 4 is fastened to the boss portion 11a. Locking projection 4a
The control valve body 3 is fixed at a predetermined position after the manual shaft 2 is positioned and prevented from falling out by engaging the locking shaft 2 with the locking groove 2a.

In this embodiment assembled as described above,
A force is applied to the locate bolt 4 in the pull-out direction, and the boss 1
The control valve body 3 prevents this from dropping out of 1a.

As described above, in the present embodiment, the locating bolt 4 is dropped by the control valve body 3 fixed in the case 1, so that the locating bolt 4 can be easily and inexpensively prevented. It can be carried out. Further, since the control valve body 3 is provided in the case 1, the possibility of oil leakage does not occur by preventing the locate bolt 4 from coming off.
Incidentally, since the control valve body 3 has a valve operated by a manual shaft and is originally a component arranged close to the manual shaft, the control valve body 3 prevents the locate bolt 4 from coming off as in the present embodiment. In arranging the locating bolts 4 close to the locating bolts 4, the design change is small and rational.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and even if there is a design change within a scope not excluding the gist of the present invention. Included in the present invention.

For example, in the embodiment, the locating bolt is shown as the locking shaft member. However, the present invention is not limited to such a thread having a threaded thread. A shaft may be used.

Further, in the embodiment, the control valve body 3 is shown as a component of the automatic transmission. However, other components may be applied as long as they are components of the automatic transmission disposed in the case 1. You may.

Further, in the embodiment, but release the head portion 4b and the control valve body 3 of Roketoboruto 4 by a distance L _2, those may abut both, i.e.,
It said distance L ₂ may be 0 if less than engagement margin L _1.

[0025]

As described above, in the manual shaft support structure of the automatic transmission according to the present invention, the automatic transmission fixed in the transmission case to the base end of the locking shaft member such as the locate bolt. Since the components of the machine are fixed, it is possible to achieve the effect that the retaining shaft member can be prevented from coming off, and that the retaining is performed by using the components of the automatic transmission.
This has the effect of being simple and low-cost, and has the effect that there is no possibility of oil leakage.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of an automatic transmission to which a manual shaft support structure according to an embodiment of the present invention is applied.

FIG. 2 is an AI view of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Transmission case 11a Boss part 11b Supporting hole 2 Manual shaft 2a Locking groove 3 Control valve body (component of automatic transmission) 4 Locate bolt (locking shaft member) 4a Locking projection (tip) 4b Head (Proximal)

Claims (2)

(57) [Scope of request for utility model registration] 1. A manual shaft is provided in a transmission case for operating a control valve of an automatic transmission in conjunction with an operation of a control lever provided in a vehicle interior, and the manual shaft is disposed in the transmission case. A predetermined portion is inserted into a support hole provided in a boss portion formed in the transmission case, and a locking groove is formed in this portion. A locking shaft member is provided so as to protrude, and a distal end of the locking shaft member is locked in the locking groove with a predetermined locking margin, while a base end of the locking shaft member is provided. An automatic transmission, wherein components of the automatic transmission are fixed in a transmission case at a position no more than the locking allowance in the axial direction from the automatic transmission. Al shaft support structure. 2. The manual shaft support structure for an automatic transmission according to claim 1, wherein a component of the automatic transmission is a control valve body.